Format this new partition as ext3. By default, this reserves 5% of the disk for root. To remove this reservation, with use "-m 0". This can be changed later with "tune2fs -m 0 /dev/sdc1".
Alternatively, one can use mkfs.ext4 instead of mkfs.ext3 to format the partition as ext4 which is backward compatible with ext3. Or simply using "mkfs -t ext4 -m 0 /dev/sdc1" to do the same thing faster.

Now create a new mount point in /media..

mkdir /media/new_drive

Edit /etc/fstab to add the new drive, such as the line

/dev/sdc1 /media/new_drive ext3 defaults,user,rw 0 0

Now mount the new partition using

mount /media/new_drive

Use df to make sure the new drive is up and you have the right amount of free space

Before accessing the newly mounted hard drive, make sure you change the access permissions on the directory first

chmod 777 /media/new_drive

In case you are having trouble unmounting a volume, use lazy unmount -l. This does not force an unmount, rather it waits until the device stops being busy.

umount -l hdock/

For the hard drive plugged in the dock, you might have input/output error with the drive if it switch from /dev/sde to /dev/sdf. To solve the problem, use UUID instead of the /dev/sd* directory name in the /etc/fstab. To obtain UUID, use command "blkid" or "ls /dev/disk/by-uuid".